Device for rejecting spurious coins



March 5, 1935.

C. H. UNDERWOOD DEVICE FOR REJECTING SPURIOUS COINS Filed April 18, 1932 3 Sheets-Sheet 1 H 5. MGZ ZZ ENTO O4 TTORN? March 5, 1935. c. H. UNDERWOOD 1,993,455

DEVICE REJECTING' 'SPURIOUS COINS Filed April 18, 1932 s Sheets-Sheet 2 5 "Hum" Hg: 4. @6054; i

March 5, 1935.

C. H. UNDERWOOD DEVICE FOR REJECTING SPURIOUS COINS Filed April 18, 1952 7 3 Sheets-Sheet 3 INVENTOR.

ATTORNEYS.

Patented Mar. 5, 1935 7 PATENT OFFICE H DEVICE FOR. REJECT'ING SPURIOUS ooiNs Cecil H. Underwood, Oakland, Calif. Application April is, 1932,.Serial No. 605,821

19 Claims.

' This invention is a device for rejecting spurious coins which is adaptable for use with various types of coin operated devices. Various methods and devices have been employed and incorporated in slot machines for discarding spurious elements; but in all cases they have been complicated, expensive to construct, and in actual practice have very little utility and are usually not efiective in accomplishing the result desired.

This device has reference to a method and means by which spurious and non-pay elements or coins are retained in an element or dis-' carded, the retained elements being visible so as to be easily detected. Variations in size,-

coeiiicient of rolling friction or sliding friction,

specific gravity or weight, all are effective in the application of this method, and such variations will prevent operation of the coin-operated device by other than a coin of predetermined or standard weight and the spurious element'will remain in sight where an attendant can readily detect the" insertion thereof.

With this method, the detector must be loaded with a standard element or coin to make it operable and then each inserted coin, or element thereafter will operate the slot machine by means of the previously inserted coin, spurious coins being retained or rejected, the last 111 serted coin always remainingin the detector un x til the next coin is inserted.

This method and device. may readily be used with any slot machine, though it ispreferred to have it made up in the form of an individual.

unit which is mounted in proper registry with a slot in the slot machine and which may be readily removed and replaced. of course, may be performed in avariety of ways, depending'on the type of slot machine and slot opening, and the detector would'p-referably be locked in position.

'My copending application, Serial No. 604,477, filed April 11,1932, is directed to a device similar to that shown in Figs. 1 to 4 of this application.

The main object of the invention, therefore, is to provide a method and means for the detection and rejection of spurious coins for slot machines in which the coins are visible for a period of time from the insertion" thereof until the insertion of the next following coin.

Another object of the invention is to provide a' method of the character outlined which may be applied to existing slot machines or incorpo- 1'ated in their structure.

'A further object of the invention is to provide means which will effectively prevent the operation of slot machines by ccins or elements which are different in size or vary in characteristics fromthe standard coin for which the slot machine is adapted to be used. g

Other objects and advantages of the invention will become apparent as the following description is read on the drawings forming a part of the specification and in which similar reference characters are used'to indicate similar parts throughout the several views, of which:

Fig. 1 is a side view of the detector as applied to my method, showing a spurious coin retained in the track.

Fig. 2 is'a view similar to Fig. 1 showing the coin detector ready for operation.

Fig. 3 is a view similar to the preceding and indicating the effect of a slug or coin which is lighter than the standard coin with which the slot machine is to be operated.

Fig. 4 clearly indicates the, forwarding of a first coin by a following coin.

Fig. 5 is a modification of the invention in which all elements having 'a weight. different than that of the standard element are rejected,

otherwise working similarly to the previous figures.

, 6 is another modification showing a different method of rejecting spurious coins.

Fig. '7 is another modification in which the first coin is forwarded by the wedging'actio-n instead of by impact as in the previous cases.

, An opening 17 is provided through the door 15' and the casing 10 and a glass 18 is secured in each opening.

A circuitous path is provided between thetwo glass plates 18 by means of metal track plates. 19 and 20.

A receiver 21 is hingedly secured to the casing 10 at 22 and has ears 23 and '24 on both sides Whichspan the top of the casing and door, locking the door in closed position, and, a keyoperated lock 25, provided for locking the receiver, which by means of the ears '23 and. 24, coincidently lock the door closed.

The slot 11' communicates with the first portion of the track which, as indicated at 26, is

' chine.

downwardly inclined and has a return bend at 27, an arcuately formed recess at 28 in which coins will come to rest, the track sloping upwardly from this recess as indicated at 29, thence communicating with the slot 12.

A selector 30 is hingedly mounted at 31 and is provided with a counterweight 32 and a stop 33, and the purpose of which is to prevent two coins passing intothe slot 12 simultaneously or in following relation.

In operation a standard coin 34 is placed in the recess 28, which places the apparatus in condition for operation.

It will be assumed that th s coin is a five-cent piece or a nickel of standard weight and dimensions, and that another nickel 35als0 of standard weight and dimensions is dropped into the slot- 11 and which will be termed the following nickel. This nickel dropping through the slot 11, rolls down the incline 26, about the return bend '27, collides with the coin 34 and drives coin 34 about the edge 36 on to the selector 39 which tips to the position shown in Fig. 4, causing the projection 33 to stop the coin 35, and prevent it passing into the slot 12 while the coin 34 passes through the slot 12 into the slot machine, coin 35 rolling back to the position. previously occupied by coin 34, the position being clearly indicated in. Figs. land 2.

It will next be assumed that a coin or slug 37 t which is irregular in shape, has a minor diameter diameter from passing into the slot machine, and

retain it within view.

It will again be assumed that a'coin or slug 39 which is lighter in weight than the nickel and possibly of smaller diameter, is dropped intoslot.

11." This coin will also rolldown the incline 26, about the return bend 27, collide with the coin 34, but the energy will not be great enough to drive the coin'34 into the slot 12 and both coins 34 and 39 will roll back to the position shown in Fig 3, therefore a lighter coin inserted in slot 11 will not operate the slot machine and will remain in sight where it can readily be detected.

Now further considering both the standard coin 34 and the lighter coin 39 in the position shown in Fig. 3. It will be assumed that another standard coin isdropped into the slot .11, which rolling down the incline 26 and about the return bend 27; will collide with the coin 39, and due to the disposition of the coin 34 in closer relation to the edge 36, the coin 39 will drive coin 34 over the edge into slot 12, thecoin 39 being stopped by the selective means 29"and rolling back into the depression, with the last inserted standard coin. The slot machine has not been operated through the agency of the spurious coin 39, and a standard coin was required to operate the mahave suflicient energy to pass the coin 39 into the slot due to the inclination of the path in advance of the depression, and under such conditions, three coins would be retained withinsight, and thereafter it would. be necessary to remove the obviated by making the track wider. is loaded in the same manner as that previously described, a coin being placed in the position indicated by dotted lines at'59-,-thiscoin being of Another lighter coin inserted would'not' spurious coins before the detector could operate, and obviously the retention of more than one coin within sight will always indicate that a spurious element has been inserted, and also clearly indicates that the spurious element did not operate through another spurious element, but could only operate through a standard element, and consequently every operation of the slot machine will be only due to the insertion of a standard coin.

From the foregoing it will. be readily seen that a slot machine will be operated only once for each standard coin inserted in my device, and that spurious elements are always retained within sight for a suificient length of time for their detection.

The modification shown in Fig. 5 is intended to reject all non-pay coins and coins which are not standard and which are either heavier or lighter than the standard coin although they may be of the same size, a non-pay coin being considered as any coin forwarded by a spurious element.

This device consists of a slot 40 continuing into a track having a downward incline 41, return bend,

42, an elongated recess 43continuing to an upward incline 44, thence into a by-pass 45 which .com-

which is also formed on the trap door 48 and. the trap door is normally recessed as'indicated and has a similar ridge that sets slightly higher than ridge 50 and which is indicated at 51.

Beneath the trap door 48 and in registry therewith is a trap element 52 having a counterweight 53 which counterweight is sufiicient to overhalance the standard coin resting on the arm 54, being pivoted at 55.

An inclined by-pass 56 communicates with the hopper 46 and an oppositely disposed and inclined by-pass 57 communicates with the discharge slot 58.

Similar to thepreviously described device, an irregular coin insertable in slot 40, will jam by its major diameter in the track, preventingits. use

in the machine, provided the track is made tov take care of this feature. It may be desirable not to have such efiectin some cases and can be The device standard type and weight.

It will now be assumed that the coin 59 is also a nickel and that a following coin 60 of similar size* and weight is inserted in slot 49.- This following coin 60 will impact with. the first'coin 59 driving itjover the hump 50 to the position shown in full lines (59) and with this hump, made to the proper height and the inclination 44 being proper as also hump 51 being of the proper height, this coin will just roll onto the trap door but not over the hump 51 and will overbalance the counterweights 61 and drop through the trap'47 on to the arm 54, the impact possibly deflecting the lever 54, but being immediately returned to the position shown in Fig. 5, by the counter weight 53 which will cause the nickel to roll down the inclined surface of arm 54 through by-pass 57 into slot 58;

It'will next be assumed that the nextcoininserted is lighter than the standard coin'and may consist of a washer, ordinary slug, or penny, This coin being lighter than the nickel will not forward the nickel to theitrap as there will not be sufiicient energy in the following coin and the two coins will come to rest in the position shown at 60 and 62 in Fig. 5, therefore, the lighter element will not operate the slot machine. The next following nickel will drive the nickel 66 on to the trap which will pass through the trap 47 and through the by-pass57 to the slot-58. Again the slot machine is operated by a standard element.

In this connection it will be pointed out that where theincline 44 and ridge'50 are properly formed that when a penny is in the position shown at 66 and a nickel in the position shown at 62, that another nickel'inserted in slot will drive the penny and nickel both across the ridge 50, and as the penny is of too light weight to deflect the trap doors and also as the nickel will be resting on counterweight 61 at the time the penny is on the trap door, the penny or light weight element will pass over the ridge 51 and through the 'by-pass V intothe hopper 46, While the nickel will stop on the trap door and pass through the trap 4'7 down on to the arm 54, rolling through the bypass 57 into slot 58. I

t will next be assumed that a lead slug of similar size to a nickel is dropped into the slot. This lead slug due to its greater weight and inertia, will drive the nickel clear across the trap doors and the ridge 51, into the Toy-pass 45 and thence to hopper 46 whereby no operation of the slot machine is obtained by the use of the lead slug. The lead slug due to its great inertia will follow the nickel on to-the trap door 48 and trip this door passing through the trap 47, and due to its greater weight will deflect the arm 54, and permit the slug to pass through the by-pass 56 into the. hopper 46. It will now be necessary to reloadthe path with'a standard element as none is left in the recess and without this element, all coins inserted will pass directly over the trap into the hopper 46; Therefore, only standard coins are forwarded to the discharge slot, and standard coins are rejected unless forwarded by a standard com.

By this it will benoted that spurious coins of either greater or will be rejected and as the track is provided with a glass on each side, the coins are always in sight and the insertion of spurious elements can always be detected. 6

Another modification is shown in Fig. 6 in which a slot 63 continues into a bend terminating in an incline 64, in cooperative relation to an opposite incline 65 which terminates in a ridge 66, thence continues into a reverse incline 6'7, continuing into a recess 68, thence into a ridge 69 which isv provided with a selector element 70 which'is similar to that shown in Figs. 1 to 4, for governing the discharge slot 71, incline 65 terminating in a hopper 72.

A nickel dropped and consequently energy sufiicient that when striking the inclined surface 65, will ride over the ridge 66 thence down incline 6'7, driving the coin "73 over ridge 69 into slot? 1, coaction of this coin with the selector 70, causing the projection '74 to stop the following coin, which comes to rest in the recess 68.

A coin which is lighter than the standard such as a penny or washer, will not have sufficient energy to ride over the: ridge 66 where the incline 65 less weight than the standardinto slot 63 gains momentum" is properly formed andpositioned, and the coin will roll back into the hopper "72.

Similarly, a lead slug having a higher coefficient of 'friction on glass and a higher coemcientpof rolling friction, due to the impaction the incline 65, which tends to flatten the lead, will prevent it from riding over the ridge 66' andthe lead slug will roll down the incline 65 into hopper '72. By this means only standard coins will ride over the ridge 66 toforwardithe coin 73 into the slot 71. A further modification is shown in Fig. 7 in which a slot I5 communicates with a transverse passage at 76 and thence with a discharge slot 77,

a recess being formed at '78. This modification is v the simplest form of my method, in which the coins are retained within sight from the time of insertion of the coin until the insertion of the next following coin, and in the event of theinsertion of lighterlcoins, until the insertion of the second 6 coin, andloperates on a slightly different principle, inasmuch as a coin resting in the recess 78 as indicated at '79, is wedged across the ridge-80 by means of the following coin which takes the same place as that previously occupied by the coin 79. If the following coin is not of sufficient weight, it will not force the coin '79 across the ridge, but if of sufficient or greater weight, coin 79 will be forwardedinto the slot 77.

It will be noted from the foregoing that'niy method contemplates the rejection of all spurious coins by means of a circuitous path with or without trap doors or elements, that it also contemplates retaining the last inserted coin in sight for a predetermined length of time where it can readilybe detected. and also contemplates the selective forwarding of but one coin at a time to the slot machine irrespective of the number inserted, and that of not permitting a spurious coin to forward the previouscoin to the slot machine for operation thereof.

Having described an operable method of utilizing my invention it will be understood that variations in form or method which are consistent with the'appended claims may be resorted to without detracting from the spirit or scope of the invention or sacrificing. any of the advantages thereof.

I claim:

1. A spurious coin rejector comprising retaining means for retaining a normal weightfirst coin in'a visible position of rest, means for forwarding a second coin. to impact with the first coin to forward the first coin to a discharge opening, and, selective meansfor rejecting forwarded first coins when forwarded by second coins of greater weight and for rejecting all coins of dif ferent weight than the first coin, and for forwarding first coins forwarded by coins of simillar weight to the discharge opening.

2. A spurious coin rejector comprising retaining means for retaining a normal weight first coin forward the first coin to a discharge opening, and,

selective means for rejecting forwarded first coins when forwarded by second coins 'of greater weight and for rejecting'all coins of different weight than the first coin, and for forwarding first coins forwarded byicoins of similar weight to the discharge opening, said means for forwarding, a second coin consisting of a receiving slot con tinuing into an inclined enclosed coin track and a return bend to prevent access'to the first coin except by means of a secondcoin deposited in the receiving slot.

3. A spurious coin rejector comprising retaining means for retaining a normal weight first coin in a visible position of rest, means for forwarding a second coin to impact with the first coin to forward the first coin to a discharge opening, and, selective means for rejecting forwarded first coins when forwarded by second coins of greater weight and for rejecting all coins of different weight than the first coin, and for forwarding first coins forwarded by coins of similar weight tothe discharge opening, said retaining means consisting of an elongated depression in which the first'coin comes to a state of rest under its own weight and in which two peripherally juxtaposed coins will come to rest.

4. A spurious coin rejector comprising retainingmeans for retaining a normal weight first coin in a visible position of rest, means for forwarding a second coin to impact with the first coin to forward the first coin to a discharge opening, and, selective means for rejecting forwarded first coins when forwarded by second coins of greater weight and for rejecting all coins of different weight than the first coin, and for forwarding first coins forwarded by coins of similar weight to the'discharge opening, said means for forwarding a second coin consisting of a receiving slot continuing into an inclined enclosed coin track and a'return bend to prevent access to the first coin except by means of a second coin de posited in the receiving slot, said retaining means consisting of an elongated. depression in which the first coin comes to a state of rest under its own weight and in which two peripherally juxtaposed coins will come to rest, said depression being formed in the coin track, the lower portion of the return bend forming one end of the depression, the other end of the depression having sufilcient rise to prevent a first coin from being driven thereover by a second coin of lighter weight and the rise being just sufiicient to permit a second coin of greater weight to follow the first coin thereover due to its excess energy, whereby a second coin of equal weight will drive the first coin over the rise and will return to the position of rest ofthe first coin.

5. A spurious coin rejector comprising retaining means for retaining a normal weight first coin in a visible position of rest, means for forwarding a second coin to impact with the first coin to forward the first coin to a discharge opening, and, selective means for rejecting forwarded first coins when forwarded by second coins of greater weight and for rejecting all coins of difierent weight than the first coin, and for forwarding first coins forwarded by coins of similar weight to the discharge opening, said selective means comprising a normally closed trap door operable under a predetermined weight whereby coins of predetermined or greater weight are permitted to pass therethrough, said trap door having means to retain a coin thereon and permit forwarding of a coin thereacross when impacted by a heavier coin, and means cooperating with the second coin for retaining the trap door in closed position when the second coin is of greater weight, and means for-forwarding normal weight coins passing through the trap door to a dischargeslot and for forwarding coins of greater weight to rejection, and consisting of a counterbalanced tiltab'le element disposed beneath the trap door and operable under a predetermined impact and weight.

6. A spurious coin rejector comprising retaining means for retaining a normal weight first coin in a visible position of rest, means for forwarding a secondicoin to impact with the first coin to forward the first coin to a" discharge opening, and, selective means for rejecting forwarded first coins when forwarded by second coins of greaterweight and for rejecting all coins of dif ferent'weight than the first coin, and for forwarding first coins forwarded by coins of similar weight to the discharge opening, said means for forwarding a second coin consisting of a receiving slot continuing into an incl ned enclosed coin track and a return bend to prevent access tothe first coin except by means of a second coin deposited 'in the receiving slot, said selective means comprising a normally closed trap door operable under a predetermined weight whereby coins of predetermined or greater weight are permitted to pass therethrough, said trap door having means to retain a coin thereon and permit forwarding of a coin thereacross when impacted by a heavier coin, and means cooperating with the second coin for retaining the trap door in closed position'when the second coin is of greater weight, and means for forwarding normal weight coins passing through the trap door to a discharge slot and for forwarding coins of greater weight to rejection, and consisting of a counterbalanced tiltable element disposed beneath the trap door and operable under a predetermined impact and weight.

7. A spurious coin rejector comprising retaining means for retaining a normal weight first coin in a visible position of rest, means for forwarding a second coin to impact with the first coin to forward the first coin to a discharge opening, and, selective means for rejecting forwarded first coinswhen forwarded by second coins of greater weight and for rejecting 'alllcoins of different weight than the first coin, and for forwarding first coins forwarded by coins of similar weight to the discharge opening, said retaining means consisting of an elongated depression in which the first coin comes to a state of rest under its own weight and in which two peripherally juxtaposed coins will come to rest, said selective means comprising a normally closed trap door operable under a predetermined weight whereby coins of predetermined or greater weight are permitted to pass therethrough, said trap door having means to retain a coin thereon and permit forwarding of a coin thereacross when impacted by a heavier coin, and means cooperating with the second coin for retaining the trap door in closed position when the second coin is vof greater weight, and means for forwarding normal weight coins passing through the trap door to a discharge slot and for forwarding coins of greater weight to rejection, and consisting of a counterbalanced tiltable element disposed beneath the trap door and operable under a predetermined impact and weight.

8. A spurious coin rejector comprising retaining means for retaining a normal weight first coin in a visible position of rest, means for forwarding a second coin to impact with the first coin to forward the first coin to a discharge opening, and, selective means for rejecting forwarded first coins when forwarded by second coins of greater weight and for rejecting all coins of different weight than the first coin, and for forwarding first coins forwarded by coins of similar weight to the discharge opening, said means for forwarding a second coin consisting of a receiving slot continuing into an inclined enclosed coin track and a return bend to prevent access to the first coin except by means of, a second coin deposited inv the receiving slot,-said retaining means consisting of an elongated depression, in which the first coin comes to a state of restunder its own weight and in which two peripherally juxtaposed coins will come to rest, said depression being formed in the coin track, the lower portion of the return bend forming one end of the depression, the other end ofthe depression having sufficient riseto prevent a first coin from being driven thereover. by a second coin of lighter weight and the rise being just sufiicient to permit asecond coin of greater weight to follow the first coin thereover due to its excess energy, wherebya second coin of" equal weight will drivexthe first coin over the rise and will return to the position of rest of the first coin, said selective means comprising a normally closed trap door operable underv a predetermined weight whereby coins of predetermined or. greaterweight are permitted to pass therethrough, said trap d'oor having means to retain a coin thereon and permit forwarding of a coin thereacross when impactedby a heavier coin, and means cooperating with the second "coin for retaining. the trap door in closed position when .thesecond coin-is ofgreaterweight, and means for forwarding normal'weight coins passing through the trapdoor to a discharge slot and for forwarding coins of greater weight to rejection,,and consisting of a counterbalanced tiltable ported selector located at the terminal of said:

path and having a portion projecting into the discharge end thereof in such manner as to-normally arrest andprevent passage of a slugof standard weight and dimensions, said inclined portion being so constructed and arranged that it will temporarily retainthe arrested slug. in a stationary position. by gravity, said inclined portion and said selector being. so relatively con-. structed and arranged asto prevent travel of the slug through the discharge end until saidslug receives a blow delivered by a following slug of standard weight during the travel of the latter slug through said path toward said discharge passage. I

10. A spurious coin detector comprising a casing having a coin path terminating at its opposite ends in a receiving slot and a discharge slot and having a depression to retain a first coin of normal weight in a position of rest, the first coin being forwarded by impact of a second coin coin of normal weight in a position of rest, the

first coin being forwarded by impact of a second coin of the same weight to the discharge slot, and means for rejecting coins of difierent weight than the first coin, and rejecting coins forwarded by coins of different weight,'said means for rejecting coins of difierent weight comprising a by-pass communicating with the coin path and a with a following coin, whereby, lighter coins pass over the trap door to the lay-pass, a coin of normal weight passesthrough the trap door when forwarded by a following coin of normal weight, the'following coin returning to the depression, and a coin of normal weight forwarded by a coin of greater weightpasses over the trap door due to the excess inertia of the following coin and cooperationthereof with the retaining means, the following coin of greater weight passing through the trap door.

12. A spurious coin detector comprising a casing having a coin path terminating at its opposite ends in a receiving slot and a discharge slot and having a depression to retain a first coin of ,normal weight in a position of rest, the first coin being forwarded by impact of a second coin of the same weight to the discharge slot, and means for rejecting coins of different weight than thefirst coin, and rejecting coins forwarded by coins of different weight, said means for rejecting coins of different weight comprising a by-j pass communicating with the coin path and a trap door operable under the weight of a normal weight coin or a coin of greater weight, said trap door having retaining means to cooperate with a following coin, whereby, lighter coins pass over the trap door to the by-pass, a coin of normal weight passes through the trap door when forwardedby a following coin of normal weight, the following coin returning to the depression, and a coin of normal weight forwarded by a coin of greater weight passes over'the trap door due to the excess inertia of the following coin and cooperation thereof with the retaining. means, the following coin of greater weight pascing throughthe trap door, and means operated by impact and weight of coins passing through the trap doorfor forwarding coins of normal weight to the discharge slot and forwardingcoins of greater weight to rejection.

13. A spurious coin detector comprising a casing havinga coin path terminating at its oppositeends in a receiving" slot and a discharge slot'and having an intermediately formed depression to retain a first coin in a position of rest, said first coin being forwardedin thepath by impact of a second coin of similar or greater weight, and retained in the depression with a second coin of lighter weight, and selective'means for discarding coins of greater weight and lighter weight and forwarding coins of standard weight to the discharge slot when forwarded by a coin of standard weight.

14. A spurious coin rejector for slot machines comprising a casing, a coin path in said casing and terminating at its opposite ends in a receiving slot and a discharge slot, a first by-pass communicating with the path and terminating in'a hopper, a second by-pass communicating between the path and the first by-pass and a' coin retaining depression formed in the path, means "interposed in said path for discarding coins of predetermined weight forwarded from said depression by coins of greater weight and for discarding coins of less weight, through the first by-pass to the hopper, said means permitting passage of coins of predetermined weight forwarded by coins of predetermined weight, and coins of greater weight, along the path, and, selective'means for directing coins of' predetermined weight to the discharge slot and coins of trap door operable'under the weight of a norinal weight coin or a coin of greater weight, said; trap door having-retainingjmeans to cooperate greater weight to the hopperthrough the second by-pass.

15. A spurious coin detector comprising a casing having a coin path terminating at its opposite ends in a receiving slot and a discharge slot and having a depression to retain a first coin of normal Weight in a position of rest, the first coin being forwarded by impact of a second coin of the same weight to the discharge slot, and means for rejecting coins of different weight than the first coin, and rejecting coins forwarded by coins of difierent Weight, said coin path having a vertical receiving slot and continuing therefrom laterally with a slight downward inclination to a return bend continuing into a slight upward inclination forming the coin retaining depression, thence continuing into a substantially horizontal by-pass, and, selective means at the coincidence of the path and the by-pass for forwarding pay coins along'the path and forwarding non-pay coins into the by-pass.

16. A spurious coin detector'comprising 3. casing having a coin path terminating at its opposite ends in a receiving slot and a discharge slot and having an intermediately formeddepression to retain a first coin in a position of rest, said first coin being forwarded in the path by impact of a second coin of similar or greater weight, and retained in the depression with a second coin of lighter weight, and selective means for discharging ,coins of greater weight and slight upward inclination forming the coin re-- taining depression, thence'continuing into a substantially horizontal by-pass, and, means at the coincidence of thepath and the bypass for forwarding pay coins. along the pathand forwarding the non-pay coins into the 'bypass. 7

17. A spurious coin rejector comprising a. coin path having a receiving slot and a discharge slot, retaining means for retaining a first coin of predetermined size and weight in a position of rest at one point within said path, said first coin being retained with a second coin of lighter Weight when impacted thereby, forwarded in the path when impacted by a second coin of equal or greater weight, and, means for forwarding said first coin to the discharge slot selective when forwarded by a second coin of similar size and weight, and, forwarding said first coin to rejection when forwarded by a second coin of difierent size and weight, and, forwarding all coins of greaterweight and for rejecting all coins: ofdifiere'nt weight than the first coin, and for forwarding first coins forwarded by coins of similar weight to the discharge opening, said retaining means retaining a secondcoin of lighter weightwith the first coin, a third coin for warding the first'coin and a fourth coin,-'coinciden'tly forwarding the second and third coins, the second coin of 'lighter weight, and third coin of equal or greater weight being coincidently forwarded by'a fourth coin of similar'or'greater weight. 1 19; Aspurious coin detector comprising a casing having a coin path terminating at its opposite ends in a, receiving slot and a discharge slot and having an intermediately formed depression to retain a'first coin in a position of rest, said first coin being forwarded in the path by impact of a second coin of similar or greater weight, and retained in the depressionwitna second coin of lighter weight, and selective means for discarding'coins of greater weight and lighter weight'and' forwarding coins of standard Weight to the discharge slot when forwarded by a coin of standard weight, said selective means comprising a normally closed trap door operable under a predetermined weight whereby coins of predetermined "or greater weight are permitted to pass therethrough', said trap door having means to retain a coin thereon and permit forwarding of acoin thereacross when impacted by a heavier coin, and means cooperating with the.

second coin forretaining. the trap door in closed position" when the second coin is of greater weight; and means for forwarding normal'weight coins passing through the trap door to a discharge slot and for forwarding coins of greater Weight to rejection, and consisting of a counterbalanced tiltable element disposed beneath the trap door and operable under a predetermined impact and weight.

- CECIL H; UNDERWOOD. 

